|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Fatigue in Materials: Fundamentals, Multiscale Modeling and Prevention
||L-75: Effects of Deformation Behaviors on S-N Fatigue Properties of High-Mn Steels at Ambient and Cryogenic Temperatures
||Hyokyung Sung, Daeho Jung, Wongyu Seo, Jehyun Lee, Sangshik Kim
|On-Site Speaker (Planned)
The S-N fatigue property of newly developed austenitic high-Mn steels was investigated at ambient temperature (298 K) and cryogenic temperature (110 K), and the results were compared to STS304L steels. High-Mn steels have quite satisfactory fatigue performance at 298 and 110 K, indicating comparable resistance to fatigue in STS304L. The S-N fatigue behavior of high-Mn steel was dependent on tensile strength, the trend of which well-matched to that of other austenitic steels. The EBSD and micrographic analyses suggested that there is no notable TRIP (transformation induced plasticity) and TWIP (twinning induced plasticity) effects in high-Mn steels under fatigue loading at 298 and 110 K unlike monotonic loading condition. In this talk, the correlation between deformation behaviors and S-N fatigue properties of high-Mn steels will be presented based on the fractographic and microscopic observations.
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